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EXPLANATION OF IC
HILC72323A-9281
052-1909-00
System Controller
Function
Outward Form
Cc
ts GND
80 pins, plastic QFP
onnects
Outputs for phase modulator
Terminal Description
a
eae
N.C. (OPEN)
No.
Symbol
ite)
Function
'0
y
'unctio'
N.C. (GND)
1 | X'TALIN
{ | Connects X-TAL 4.5 MHZ
X' TAL OUT
1 | Connects X-TAL 4.5 MHZ
2 | NC.
- | N.C. (OPEN)
3 | FM ST IND
I | Inputs Low in FM
a
I | Detects AM signal
~
>
=
wa o
5 [esp
clus
[rfxcom
SS
8 | AM +B
Outputs Low in AM +B
9 |] AMUTE
Outputs Low in AUDIO MUTE ON
10 | FM DX/LO
O | Outputs Hi in FM DX
«| N.C. (GND)
Inputs Low in TAPE mode
Inputs Low in TAPE mode, FOR . Inputs Hi in TAPE
mode, REV.
Zz is)
I
m w
7)
|
2
a
Lest
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|
Nv
=| >
a ies)
_
14 | FF/REV
Inputs Low in TAPE mode, FF/REW
wibiaio
f o
fo[xcormo
19 | E-DO
O | Outputs DATA for E-VOL
20 | E-CLK
O }{ Outputs E-VOL for CLOCK
Nn
IF REQ
Inputs Hi in RADIO SEEK
|
Ww
Zz se)
O | N.C. (OPEN)
24 | REM +B
O | Outputs Hi in REM +14V ON
25
6
N.C.
Fo | N.C, (OPEN)
27 | KS3
28 | KS2
29 | KS 1
O | Key scan output
30 | KSO
31 | VDD
- | VDD SV power supply
32 | KI3
33 | KI2
;
34}
KI
I | Key scan input
35 | KIO
Outputs LCD segment control
Displays COM2 on LCD
Displays COM! on LCD
N.C. (GND)
Inputs Hi in ACC ON
1
Connects VDD
Setup terminal
I | Inputs AM IF
I | Inputs RESET circuit
VDD 5V power supply
gees
ee
-3-
AR31370E
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